<!DOCTYPE html>
<meta charset="utf-8">
<meta name="color-scheme" content="light dark">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="Content-Security-Policy"
    content="default-src 'self' blob:; script-src 'self'; style-src 'self' blob: 'unsafe-inline'; img-src 'self' blob: data:; connect-src 'self' blob: data: *; frame-src blob: data:; object-src blob: data:; form-action 'none';">
<title>E-Book Reader</title>
<style>
    :root {
        --active-bg: rgba(0, 0, 0, .05);
    }

    @supports (color-scheme: light dark) {
        @media (prefers-color-scheme: dark) {
            :root {
                --active-bg: rgba(255, 255, 255, .1);
            }
        }
    }

    html {
        height: 100%;
    }

    body {
        margin: 0 auto;
        height: 100%;
        font: menu;
        font-family: system-ui, sans-serif;
    }

    #drop-target {
        height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        /* visibility: hidden; */
        /*隐藏*/
    }

    #drop-target h1 {
        font-weight: 900;
    }

    #file-button {
        font: inherit;
        background: none;
        border: 0;
        padding: 0;
        text-decoration: underline;
        cursor: pointer;
    }

    .icon {
        display: block;
        fill: none;
        stroke: currentcolor;
        stroke-width: 2px;
    }

    .empty-state-icon {
        margin: auto;
    }

    .toolbar {
        box-sizing: border-box;
        position: absolute;
        z-index: 1;
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        height: 48px;
        padding: 6px;
        transition: opacity 250ms ease;
        visibility: hidden;
    }

    .toolbar button {
        padding: 3px;
        border-radius: 6px;
        background: none;
        border: 0;
        color: GrayText;
    }

    .toolbar button:hover {
        background: rgba(0, 0, 0, .1);
        color: currentcolor;
    }

    #header-bar {
        top: 0;
    }

    #nav-bar {
        bottom: 0;
    }

    #progress-slider {
        flex-grow: 1;
        margin: 0 12px;
        visibility: hidden;
    }

    #side-bar {
        visibility: hidden;
        box-sizing: border-box;
        position: absolute;
        z-index: 2;
        top: 0;
        left: 0;
        height: 100%;
        width: 320px;
        transform: translateX(-320px);
        display: flex;
        flex-direction: column;
        background: Canvas;
        color: CanvasText;
        box-shadow: 0 0 0 1px rgba(0, 0, 0, .2), 0 0 40px rgba(0, 0, 0, .2);
        transition: visibility 0s linear 300ms, transform 300ms ease;
    }

    #side-bar.show {
        visibility: visible;
        transform: translateX(0);
        transition-delay: 0s;
    }

    #dimming-overlay {
        visibility: hidden;
        position: fixed;
        z-index: 2;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, .2);
        opacity: 0;
        transition: visibility 0s linear 300ms, opacity 300ms ease;
    }

    #dimming-overlay.show {
        visibility: visible;
        opacity: 1;
        transition-delay: 0s;
    }

    #side-bar-header {
        padding: 1rem;
        display: flex;
        border-bottom: 1px solid rgba(0, 0, 0, .1);
        align-items: center;
    }

    #side-bar-cover {
        height: 10vh;
        min-height: 60px;
        max-height: 180px;
        border-radius: 3px;
        border: 0;
        background: lightgray;
        box-shadow: 0 0 1px rgba(0, 0, 0, .1), 0 0 16px rgba(0, 0, 0, .1);
        margin-inline-end: 1rem;
    }

    #side-bar-cover:not([src]) {
        display: none;
    }

    #side-bar-title {
        margin: .5rem 0;
        font-size: inherit;
    }

    #side-bar-author {
        margin: .5rem 0;
        font-size: small;
        color: GrayText;
    }

    #toc-view {
        padding: .5rem;
        overflow-y: scroll;
    }

    #toc-view li,
    #toc-view ol {
        margin: 0;
        padding: 0;
        list-style: none;
    }

    #toc-view a,
    #toc-view span {
        display: block;
        border-radius: 6px;
        padding: 8px;
        margin: 2px 0;
    }

    #toc-view a {
        color: CanvasText;
        text-decoration: none;
    }

    #toc-view a:hover {
        background: var(--active-bg);
    }

    #toc-view span {
        color: GrayText;
    }

    #toc-view svg {
        margin-inline-start: -24px;
        padding-inline-start: 5px;
        padding-inline-end: 6px;
        fill: CanvasText;
        cursor: default;
        transition: transform .2s ease;
        opacity: .5;
    }

    #toc-view svg:hover {
        opacity: 1;
    }

    #toc-view [aria-current] {
        font-weight: bold;
        background: var(--active-bg);
    }

    #toc-view [aria-expanded="false"] svg {
        transform: rotate(-90deg);
    }

    #toc-view [aria-expanded="false"]+[role="group"] {
        display: none;
    }

    .menu-container {
        position: relative;
    }

    .menu,
    .menu ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .menu {
        visibility: hidden;
        position: absolute;
        right: 0;
        background: Canvas;
        color: CanvasText;
        border-radius: 6px;
        box-shadow: 0 0 0 1px rgba(0, 0, 0, .2), 0 0 16px rgba(0, 0, 0, .1);
        padding: 6px;
        cursor: default;
    }

    .menu.show {
        visibility: visible;
    }

    .menu li {
        padding: 6px 12px;
        padding-left: 24px;
        border-radius: 6px;
    }

    .menu li:hover {
        background: var(--active-bg);
    }

    .menu li[aria-checked="true"] {
        background-position: center left;
        background-repeat: no-repeat;
        background-image: url('data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2224%22%20height%3D%2224%22%3E%3Ccircle%20cx%3D%2212%22%20cy%3D%2212%22%20r%3D%223%22%2F%3E%3C%2Fsvg%3E');
    }

    .popover {
        background: Canvas;
        color: CanvasText;
        border-radius: 6px;
        box-shadow: 0 0 0 1px rgba(0, 0, 0, .2), 0 0 16px rgba(0, 0, 0, .1), 0 0 32px rgba(0, 0, 0, .1);
    }

    .popover-arrow-down {
        fill: Canvas;
        filter: drop-shadow(0 -1px 0 rgba(0, 0, 0, .2));
    }

    .popover-arrow-up {
        fill: Canvas;
        filter: drop-shadow(0 1px 0 rgba(0, 0, 0, .2));
    }
</style>
<input type="file" id="file-input" hidden>
<!-- 文件拖动 添加文件-->
<div id="drop-target" class="filter">
    <div>
        <svg class="icon empty-state-icon" width="72" height="72" aria-hidden="true">
            <path d="M36 18s-6-6-12-6-15 6-15 6v42s9-6 15-6 12 6 12 6c4-4 8-6 12-6s12 2 15 6V18c-6-4-12-6-15-6-4 0-8 2-12 6m0 0v42" />
        </svg>
        <h1>Drop a book here!</h1>
        <!-- 也可点击按钮添加文件 -->
        <p>Or <button id="file-button">choose a file</button> to open it.</p>
    </div>
</div>
<div id="dimming-overlay" aria-hidden="true"></div>
<div id="side-bar">
    <div id="side-bar-header">
        <img id="side-bar-cover">
        <div>
            <h1 id="side-bar-title"></h1>
            <p id="side-bar-author"></p>
        </div>
    </div>
    <div id="toc-view"></div>
</div>
<div id="header-bar" class="toolbar">
    <button id="side-bar-button" aria-label="Show sidebar">
        <svg class="icon" width="24" height="24" aria-hidden="true">
            <path d="M 4 6 h 16 M 4 12 h 16 M 4 18 h 16" />
        </svg>
    </button>
    <div id="menu-button" class="menu-container">
        <button aria-label="Show settings" aria-haspopup="true">
            <svg class="icon" width="24" height="24" aria-hidden="true">
                <path
                    d="M5 12.7a7 7 0 0 1 0-1.4l-1.8-2 2-3.5 2.7.5a7 7 0 0 1 1.2-.7L10 3h4l.9 2.6 1.2.7 2.7-.5 2 3.4-1.8 2a7 7 0 0 1 0 1.5l1.8 2-2 3.5-2.7-.5a7 7 0 0 1-1.2.7L14 21h-4l-.9-2.6a7 7 0 0 1-1.2-.7l-2.7.5-2-3.4 1.8-2Z" />
                <circle cx="12" cy="12" r="3" />
            </svg>
        </button>
    </div>
</div>
<div id="nav-bar" class="toolbar">
    <button id="left-button" aria-label="Go left">
        <svg class="icon" width="24" height="24" aria-hidden="true">
            <path d="M 15 6 L 9 12 L 15 18" />
        </svg>
    </button>
    <input id="progress-slider" type="range" min="0" max="1" step="any" list="tick-marks">
    <datalist id="tick-marks"></datalist>
    <button id="right-button" aria-label="Go right">
        <svg class="icon" width="24" height="24" aria-hidden="true">
            <path d="M 9 6 L 15 12 L 9 18" />
        </svg>
    </button>
</div>
<script src="reader.js" type="module"></script>